What does code P1603 mean on Jaguar vehicles?
The ECU detects a malfunction in the EEPROM memory of the transmission control module.
OBD-II Code Jaguar
P1603 — Jaguar — TCM EEPROM Malfunction
The ECU detects a malfunction in the EEPROM memory of the transmission control module.
Common symptoms
- Erratic shifting behavior
Possible causes
- Faulty TCM EEPROM memory
Initial recommendation
Reprogram the TCM or replace it if EEPROM fault persists.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Jaguar code P1603 with your vehicle's actual symptoms for more complete diagnostic guidance.
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